PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

404856Reducer,tube

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 4730-00-778-6570 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-778-6570 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-778-6570. Primary manufacturer part number: 404856.
Features
  • Reducer,tube — FSC 4730
  • Nominal Outside Diameter Tube Accommodated: 0.845 INCHES SECOND END IN
  • Nominal Overall Length: 2.350 INCHES IN
  • Material: ALUMINUM ALLOY OVERALL
  • Connection Style: PLAIN (TUBE) ALL ENDS
  • Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS
  • Nominal Outside Diameter Tube Accommodated: 1.2185 INCHES FIRST END IN
  • Reducer Type: CONCENTRIC
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Aluminum Alloy Overall construction
General Description

The Reducer,tube, cataloged under National Stock Number 4730-00-778-6570, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-778-6570
Primary Part Number404856
Item NameReducer,tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusACTIVE
Nominal Outside Diameter Tube Accommodated0.845 INCHES SECOND END IN
Nominal Overall Length2.350 INCHES IN
MaterialALUMINUM ALLOY OVERALL
Connection StylePLAIN (TUBE) ALL ENDS
Connection TypeUNTHREADED INTERNAL TUBE ALL ENDS
Nominal Outside Diameter Tube Accommodated1.2185 INCHES FIRST END IN
Reducer TypeCONCENTRIC
Tubing Wall Nominal Thickness for Which Designed0.088 INCHES ALL ENDS IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5305-00-013-2228 INTERCHANGEABLE
Screw,machine
5930-00-044-3514 INTERCHANGEABLE
Switch,toggle
5995-01-395-8338404856-145 INTERCHANGEABLE
Wiring Harness
Astronics Test Systems Inc
Cross-Reference Index
Part NumberManufacturer
404856 Rtx Corporation Div Pratt & Whitney (USA)
404856 PRIMARY Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
Related Parts
5305-00-013-2228INTERCHANGEABLE
SCREW,MACHINE
5930-00-044-3514INTERCHANGEABLE
SWITCH,TOGGLE
5995-01-395-8338INTERCHANGEABLE
WIRING HARNESS
404856-145

Frequently Asked Questions

What is NSN 4730-00-778-6570?

NSN 4730-00-778-6570 is a Reducer,tube, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-778-6570?

NSN 4730-00-778-6570 has 2 cross-referenced part numbers: 404856 (Rtx Corporation Div Pratt & Whitney), 404856 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).

What NSN replaces 4730-00-778-6570?

There are 3 known substitutes for 4730-00-778-6570: 5305-00-013-2228, 5930-00-044-3514, 5995-01-395-8338. Verify interchangeability with system specifications before substitution.

What are the specifications of 404856?

Key specifications for 404856: Nominal Outside Diameter Tube Accommodated: 0.845 INCHES SECOND END IN; Nominal Overall Length: 2.350 INCHES IN; Material: ALUMINUM ALLOY OVERALL; Connection Style: PLAIN (TUBE) ALL ENDS. 8 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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